Dark Sky Odds

Stargazing at Winklmoos-Alm: when is the sky clear and dark?

December is the best month for stargazing at Winklmoos-Alm: on average 40 clear, moonless hours of full darkness, and 23% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 69% of Europe’s land (NASA VIIRS 2025).

Data updated: 31 December 2025 · Sources and licences

Calculated 5 November 2026 · cloud cover ERA5 2006–2025 · night lights NASA VIIRS 2025

International Dark Sky Park · Germany · DarkSky International

DecemberBest month
289Clear moonless dark hours a year
69%darker than … of Europe’s land
23%Nights with ≥ 2 such hours (December)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January18%3118317%
February20%3314423%
March21%3213524%
April18%239624%
May11%116217%
June7%63418%
July7%75015%
August13%189219%
September18%2712322%
October18%3015419%
November20%3216819%
December23%4018122%

Climate, not a forecast: these are shares of past nights (ERA5 reanalysis, 2006–2025), not a prediction for a particular night. Check a forecast before you go.

Light pollution

Darker than69% of Europe’s land
Light pollutiondark rural sky (darkest 20–50 %)
Sky-glow index (own, VIIRS) — Darkest spot we found1.31
Sky-glow index (own, VIIRS) — at the official map point1.33
Sky-glow index (own, VIIRS) — median across the area1.36
Darkest spot we found47.642, 12.608 (map) — within 2.8 km of the Wikidata point (no OSM boundary)

Next new moons

New moonNightMoonless dark hours that nightTypical share of good nights that month
9 November 20268–9 November 202610.820%
9 December 20268–9 December 202611.723%
7 January 20277–8 January 202711.718%
6 February 20276–7 February 202710.720%
8 March 20277–8 March 20279.221%
6 April 20276–7 April 20277.218%
6 May 20275–6 May 20275.011%
4 June 20274–5 June 20272.57%
4 July 20273–4 July 20272.07%
2 August 20271–2 August 20274.313%
31 August 202731 August 2027 – 1 September 20276.813%
30 September 202729–30 September 20278.818%

Hours with the Sun below −18° and the Moon below the horizon, on the night of the new moon, at the darkest spot.

Meteor showers

ShowerPeak nightChance of a clear peak nightMoon litMoonless dark hours (Sun < −12°)Radiant max. height
Leonids17–18 November 202633%55%6.564°
Geminids *13–14 December 202638%20%10.375°
Geminids *14–15 December 202628%28%9.275°
Quadrantids3–4 January 202718%13%11.871°
Lyrids22–23 April 202737%95%1.276°
Eta Aquariids *5–6 May 202725%0%6.715°
Eta Aquariids *6–7 May 202732%0%6.715°
Perseids *12–13 August 202725%84%3.267°
Perseids *13–14 August 202732%90%2.268°
Orionids21–22 October 202732%59%3.358°
Leonids *17–18 November 202733%82%1.764°
Leonids *18–19 November 202728%73%3.064°
Geminids14–15 December 202728%98%0.075°

* The peak falls in daylight in Europe, so both neighbouring nights are shown.

Clear peak night: at least 2 hours with ≤ 20 % cloud while the Sun is below −12°, on the same calendar night ± 1 in 2006–2025.

How we calculate